Charles edwin dtjlin



(No Model.) I O. E. DULIN.

. GENT RIPUGAL MACHINE.

No. 466,459. Patented Jan. 5, 1892.

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g Q a v 5 5 at? M Eillllllllllllllllllllllh UNITED STATES PATENT OFFICE,

CHARLES EDWIN DULIN, OF PHILADELPHIA, PENNSYLVANIA, 'ASS IGNOR OFONE-HALF TO ALFRED N. HARRIS, OF SAME PLACE.

CENTRIFUGAL MACHINE.

SPECIFICATION forming part of Letters Patent No. 466,459, dated January5, 1892. Application filed April 8, 1891. Serial No. 388.103. (N model.)

To all whom it may concern:

Be it known that I, CHARLES EDWIN DULIN, a citizen of the United States,residing at the city of Philadelphia, in the county of Philadelphia andState of Pennsylvania, have invented certain new and useful Improvementsin Centrifugal Machines, of which the follow- The principal object ofpresent invention, is to providea centrifugal machine with simple,durable, and efficient apparatus for expeditiously removing the solidportions of the material being operated upon without injuring theinterior of the sieve or basket and with simple and inexpensive meansfor raising said apparatus out of the sieve or basket during theoperation of separating the liquid and for lowering the same into thebasket to remove the solid material without stopping the revolution ofthe basket.

Inmy invention use is made of a non-rotating and axially-movablecylinder provided with a radially-projecting spiral flange or scraperand adapted to be placed in and lifted out of the interior of a rotatingbasket'or sieve, in connection with mechanism attached to the outer easeor frame of the machine and adapted to lift and hold the cylinder out ofthe basket or sieve during the separation of the liquid and to place andhold the same in the basket or sieve after the separation of the liquid,in order to cause the scraper or flange to scrape the solid matter fromand lift it upward out of the sieve or basket and deposit it upon asuitable table. 7 l

The nature and characteristic features of the present invention will bemore fully understood from the following description, taken inconnection with the accompanying drawings, forming part hereof, and inwhich- Figure 1 is an elevation, partly in section, of a centrifugalmachine provided with the improvements embodying my invention andshowing a non-rotating cylinder having a radially-disposed spiralscraper or flange and means for shifting the cylinder axially into orout of the basket or sieve of the machine;

.and Fig. 2 is a horizontal section on the line m a: of Fig. 1, showingmechanism for raising and lowering the non-rotating cylinder.

Before proceeding to describe my inve11- tion abrief description of aWell-known type of centrifugal machine will be given; but it must beborne in mind that my invention is not limited to the employment of sucha type of machine, because it is applicable to other types of machines.

In the drawings, (L is an outer casing or curb, provided with an offtakea and with rods or stays a adapted to support a frame 0 for a purpose tobe presently described.

' a is a plate provided with a journal or bearing at, co'hnected withthe casing or curb a by means of pillars of".

a are rods attached to the plate a and to the floor or to a bed-plate(not shown) in order to retain the machine to place.

a is a shaft supported in the step or bearing a and provided with asieve or basket a a is a pulley keyed or otherwise attached to the shaft(1, and adapted to be revolved by means of a belt. (Not shown.)

a is a spout provided with an improved form of valve hereinafterdescribed, and with expanded or flaring months a and a for receiving andconveying the material to be operated upon into and deposit the same onthe bottom of the basket or sieve a In use the sieve or basket a isrevolved rapidly and the material to be'operated upon 'ordried-forexample, sugar or brewers grainis introduced either in the mannerhereinafter described or in any convenient manner'into the basket orsieve a Thecentrifugal force generated bythe rapid revolution of thesieve or basket a causes the liquid associated with the grain or thesirup or molasses of the sugar to penetrate the perforated walls of thebasket or carrier and enter the outer casing or curb u, from which itmay be drawn off by means of the offtake a. The grain or sugar of courseis retained in the basket or sieve.

My invention comprises apparatus for removing the matter whichaccumulates in the basket or sieve during the operation of the machine;and having thus indicated the parts and mode of operation of one type ofmachine to which my invention is applicable Iwill now proceed todescribe the construction and mode of operation of an apparatusembodying the invention.

In the drawings, 0 is a valve pivotally attached to the interior wallsof the spout a by means of trunnions c and adapted to normally occupy aposition at an angle of fortyfive degrees (more or less) with the axisof the spout.

c is a weighted lever attached to one of the trunnions c and adapted tonormally close the valve 0', so as to enable the upper portion of thespout a to be used as a receptacle for a charge, which latter may beintroduced into the basket or sieve whenever it becomes desirable ornecessary so to do by the simple operation of elevating the lever c byhand or in any other convenient manner.

I) is a cylinder arranged around the spout (1 and provided with aradially-disposed spiral flange or scraper 1), adapted to fit snuglyagainst the interior of the side wall of the basket or sieve a b arearms or guides attached to the periphery of the cylinder 1) and providedwith eyes adapted to engage with and slide on the rods a so as to affordthe cylinder a range of axial movement and so as to prevent the samefrom being revolved.

b are levers pivotally attached at or near the respective centersthereof td the exterior of the casing or curb a and provided, respectively, at one extremity thereof with a toothed sector b and pivotallyconnected at the other extremities thereof with the cylinder 1) by meansof links I), pivoted, respectively, to the arms b 1) is a shaft providedwith a hand-wheel b and with gear-wheels b meshing with the sectors I),so that the cylinder 11 may be lowered into the revolving sieve orbasket a in such manner that the scraper 12 contacts with the perforatedside wall and bottom thereof or may be lifted therefrom by the simpleoperation of rotating the hand-wheel U.

The material to be operated upon-for example, grain or sugar-is placedin the upper open extremity a of the spout 01, and is detained thereinby the valve 0 until a sufficient quantity thereof for charging thebasket or sieve a has been accumulated, whereupon the handle 0 is liftedand the charge permitted to descend into the revolving basket or sieve,and then treated in the usual manner. After the liquid has beenseparated from the solid material by means of the rotating basket orsieve a and in the ordinary operation of the machine the lever c ispermitted to close the valve 0, or the introduction of material throughthe spout a is otherwise stopped, and the cylinder 1) is lowered intothe rotating basket or sieve a so that the scraper or flange 1) scrapesthe solid material from the interior of the sieve or basket and deliversit in an upward direction from the same. Of course the scraper or flangemay be arranged to deliver the solid material upon any preferred form ofcarrier adapted to convey it away from the machine. In the presentinstance the solid material is permitted to leave the flange or scraperradially and in such manner that it is deposited upon a rotating tableI), attached to or formed integral with the basket or sieve a b is astationary flange supported by the curb or casing of the machine andarranged around the rotating table I) in order to pre vent the solidmatter from accidentally passing over the periphery thereof. In practicethe solid material may be removed from the rotating table I) by means ofa scoop or in any other preferred manner. After the solid matter hasbeen removed from the sieve or basket the cylinder Z) is again liftedout of the same and a fresh charge of grain or other material isintroduced in the basket or sieve a It will be obvious to those skilledin the art to which my invention appertains that modifications may bemade in the details thereof. For example, the valve 0' may be dispensedwith and the successive charges introduced into the basket or sieve a inany other preferred manner.

Having thus described the nature and objects of my present inventiomwhatI claim as new, and desire to secure by Letters Patent, is-

1. In a centrifugal machine, the combination of a rotating sieve orbasket, an adjustable spiral flange or scraper to remove the contents ofthe basket or sieve upward and outward, and means for adjusting saidflange or scraper out of range of said basket or sieve to permit of theordinary operation of the machine and for shifting it into range of thesame to permit said scraper or flange to automatically remove in anupward direction the contents, substantially as and for the purposes setforth.

2. In a centrifugal machine, the combination of a rotating sieve orbasket, a non-rotating axially-movable cylinder, a radiallyprojectingspiral flange or scraper attached to said cylinder, and means forlifting said cylinder out of range of said basket or sieve to permit ofthe ordinary operation of the ma chine and for lowering it into the sameto permit said scraper or flange to remove the contents thereof upwardand outward, sub stantially as and for the purposes set forth.

3. In a centrifugal machine, the combination of a rotating sieve orbasket, a rotating table arranged around the top of said basket orsieve, a spiral flange or scraper to remove the contents of I the basketupward and outward onto said table, and means for shifting said flangeor scraper with reference to said basket or sieve, substantially as andfor the purposes set forth.

4. In a centrifugal machine, the combination ofa rotating sieve 0rbasket, a rotating table arranged around the top of said basket orsieve, a flanged guard around said table, a spiral flange or scraperadapted to remove the contents of the sieve or basket upward and outwardonto said table, and means for adjusting said flange or scraper withreference to said sieve or basket, substantially as and for the purposesset forth.

v 5. In a centrifugal machine, the comloina-v tlon of a rotating sieveor basket, a non-rowitnesses. 7

CHARLES EDWIN DULIN. Witnesses:

THOMAS M. SMITH, RICHARD C. MAXWELL.

